Two people have been rushed to hospital with serious injuries after a crash involving a car and a motorcycle in Market Rasen.
Lincolnshire Police were called to the crash on the A46, Caistor Road on Sunday August 7 at around 4.40pm.
Officers are warning that the road is likely to be closed for a number of hours and diversions are in place.
It is believed a black Seat Toledo and a black Honda motorcycle are the vehicles involved.
Anyone who was in the area just before 4.40pm on Sunday, August 7 and saw either the car or the motorcycle before the collision, or saw the collision itself, is asked to contact police on 101 or the witness hotline on 01522 558855.
Police are expected to release further updates this evening.